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Roger, BMW Master Tech
Category: BMW
Satisfied Customers: 3045
Experience:  10 yrs. experience as BMW Master Technician, shop foreman and dealer.
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I have a mini s r56 which seems to flat line at around

Customer Question

Hi I have a mini cooper s r56 which seems to flat line at around 4500rpm and do not know what is causing this
Submitted: 2 years ago.
Category: BMW
Expert:  nabilc replied 2 years ago.
Hello and Welcome! I'm Billy and i will assist you with your inquiry. Feel free to ask if any further info is needed.
What mileage do you have on this vehicle?
do you have any other symptoms (hesitation, rough idle, hard starting etc..)? or just the rpm stops at 4500?
do you have any warning lights on, and did you check for any fault codes?
Customer: replied 2 years ago.
Hi the car has done 70k miles.
No other symptoms, the car pulls well at low rpm and when it hits around 4500 rpm it takes a very long time to get to the red line as if the car is being restricted. No fault codes or warning lights hence the issue.
Expert:  nabilc replied 2 years ago.
Would you be able to check the pressure in the exhaust?